Few issues capture our anxiety about young people and digital media so perfectly as sexting. As with technologies at least as far back as the telegraph, much of this anxiety has focused specifically on girls and women.

From the tablet to the TV screen, media are a huge influence on how we see ourselves and our world. Nowhere, perhaps, is that more true than when it comes to gender: media provide many of our ideas of what “male” and “female” are, and many of our models of how to behave, what to avoid doing, and whom to emulate in order to play the role we’ve been assigned.

Editor’s note: There is so much conflicting information about screen time, and a lot of it serves to make us feel guilty, worried or both. We asked the Director of Education at Media Smarts (Canada’s Centre for Digital and Media Literacy), Matthew Johnson, to give us the straight goods on the latest info. What is the big deal with screen time? Here’s his response.